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Date:   Wed, 23 Mar 2022 05:30:09 +0000
To:     Vladimir Oltean <>
Subject: Re: [PATCH net-next] net: dsa: fix missing host-filtered multicast


This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <>:

On Tue, 22 Mar 2022 02:37:01 +0200 you wrote:
> DSA ports are stacked devices, so they use dev_mc_add() to sync their
> address list to their lower interface (DSA master). But they are also
> hardware devices, so they program those addresses to hardware using the
> __dev_mc_add() sync and unsync callbacks.
> Unfortunately both cannot work at the same time, and it seems that the
> multicast addresses which are already present on the DSA master, like
> 33:33:00:00:00:01 (added by addrconf.c as in6addr_linklocal_allnodes)
> are synced to the master via dev_mc_sync(), but not to hardware by
> __dev_mc_sync().
> [...]

Here is the summary with links:
  - [net-next] net: dsa: fix missing host-filtered multicast addresses

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